Pump piston with spring plate for high pressure fuel pump spring plate is of thin-walled light-weight deep-drawn or extruded material and connected to piston by welding or clamping etc.

摘要

The pump piston (1) and the spring plate (2) are separate components. The spring plate is fabricated from thin-walled light-weight material, e.g. sheet metal and is deep-drawn or extruded. The inner edge (6) of the plate is connected to the jacket surface (5) of the pump piston by pressing, welding, soldering, adhesive, or flanging, snap-connection, etc. in a ring groove (7) in the piston. The spring plate is perforated. The jacket surface of the piston is processed by center-less grinding, and finished by honing.